<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <!-- 准备好一个"容器" -->
    <div id="test1"></div>
    <div id="test2"></div>
    <div id="test3"></div>

    <!-- 引入react核心库 -->
    <script type="text/javascript" src="../js/react.development.js"></script>
    <!-- 引入react-dom,用于支持react操作DOM -->
    <script type="text/javascript" src="../js/react-dom.development.js"></script>
    <!-- 引入babel,用于将jsx转为js -->
    <script type="text/javascript" src="../js/babel.min.js"></script>
    <!-- 引入prop-types,用于对组件标签属性进行限制 -->
    <script type="text/javascript" src="../js/prop-types.js"></script>

    <script type="text/babel">
        //创建组件
        class Person extends React.Component {
            constructor(props) {
                //构造器是否接受props,是否传递给super,取决于:是否希望在构造器中通过this访问props
                // console.log(props);
                super(props)
                console.log('constructor', this.props);
            }

            //对标签属性进行类型 必要性的限制
            static propTypes = {
                name: PropTypes.string.isRequired,//限制name必传,且为字符串
                sex: PropTypes.string,//限制sex为字符串
                age: PropTypes.number,//限制age为数值
                speak: PropTypes.func//限制speak为函数
            }
            //指定默认标签属性值
            static defaultProps = {
                sex: '不男不女',//sex默认值为男
                age: 18//age默认值为18
            }
            state = {}

            render() {
                // console.log(this);
                const { name, age, sex } = this.props;
                //props是只读的
                // this.props.name='jack' /此行航代码会报错,因为props是只读的
                return (
                    <ul>
                        <li>姓名:{name}</li>
                        <li>性别:{sex}</li>
                        <li>年龄:{age}</li>
                    </ul>
                )
            }
        }

        //2.渲染虚拟DOM到页面
        ReactDOM.render(<Person name="jerry" speak={speak} />, document.getElementById('test1'))
        ReactDOM.render(<Person name="tom" age={18} sex="女" />, document.getElementById('test2'))

        const p = { name: '老刘', age: 18, sex: '女' }
        // ReactDOM.render(<Person name="老刘" age="30" sex="女" />, document.getElementById('test3'))
        ReactDOM.render(<Person {...p} />, document.getElementById('test3'))

        function speak() {
            console.log('我说话了');
        }
    </script>



</body>

</html>